/* Landing page da LimpaAr: sem JavaScript, sem fontes ou serviços de terceiros */
:root {
  --marinho: #17214a;
  --royal: #233f99;
  --ciano: #22b8e6;
  --gelo: #eaeff7;
  --fundo: #f6f8fc;
  --texto: #1d2539;
  --suave: #55607a;
  --borda: #d5dff2;
  --whats: #1fa855;
  --raio: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--texto);
  background: var(--fundo);
  line-height: 1.55;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--royal); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; color: var(--marinho); }
h1 { font-size: clamp(1.9rem, 4.6vw, 3rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -.01em; }
h3 { font-size: 1.15rem; }

.caixa { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 16px; }

.pular { position: absolute; left: -9999px; }
.pular:focus { left: 16px; top: 16px; z-index: 100; background: #fff; padding: 8px 12px; border-radius: 8px; }

/* Topo */
.topo { background: #fff; border-bottom: 1px solid var(--borda); position: sticky; top: 0; z-index: 10; }
.topo-linha { display: flex; align-items: center; gap: 24px; min-height: 72px; }
.marca img { width: 170px; }
.topo nav { display: flex; gap: 22px; margin-left: auto; }
.topo nav a { color: var(--texto); text-decoration: none; font-weight: 500; }
.topo nav a:hover { color: var(--royal); }

/* Botões */
.botao {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  background: var(--whats); color: #fff; text-decoration: none; font-weight: 700;
  padding: 14px 22px; border-radius: 999px; border: 2px solid transparent;
  transition: transform .15s ease, background .15s ease;
}
.botao:hover { background: #178c46; transform: translateY(-1px); }
.botao:focus-visible, a:focus-visible { outline: 3px solid var(--ciano); outline-offset: 3px; }
.botao-pequeno { padding: 9px 18px; font-size: .95rem; }
.botao-claro { background: #fff; color: var(--royal); border-color: var(--borda); }
.botao-claro:hover { background: var(--gelo); }
.botao-contorno { background: transparent; border-color: #fff; color: #fff; }
.botao-contorno:hover { background: rgba(255, 255, 255, .12); }
.acoes { display: flex; flex-wrap: wrap; gap: 12px; }

/* Destaque inicial */
.heroi {
  background: linear-gradient(160deg, var(--marinho) 0%, var(--royal) 70%, #2b55c4 100%);
  color: #e8eefc; padding: 64px 0 72px;
}
.heroi h1 { color: #fff; }
.heroi-grade { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; }
.etiqueta {
  display: inline-block; margin: 0 0 14px; padding: 4px 12px; border-radius: 999px;
  background: rgba(34, 184, 230, .18); color: #bfeeff; font-weight: 600; font-size: .9rem;
}
.lead { font-size: 1.15rem; margin: 0 0 28px; max-width: 36em; }
.destaque-numero { margin: 26px 0 0; color: #c9d6f7; }
.destaque-numero strong { color: #fff; }

/* Seções */
.secao { padding: 64px 0; }
.secao-clara { background: #fff; }
.sub { color: var(--suave); margin: 0 0 28px; font-size: 1.05rem; }
.nota { color: var(--suave); margin: 20px 0 0; }

.cartoes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.cartao { background: #fff; border: 1px solid var(--borda); border-radius: var(--raio); padding: 22px; border-top: 4px solid var(--ciano); }
.cartao p { margin: 0; color: var(--suave); }

.beneficios, .passos { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.beneficios li, .passos li { display: flex; flex-direction: column; gap: 6px; padding: 20px; border-radius: var(--raio); background: var(--gelo); }
.beneficios strong, .passos strong { color: var(--marinho); font-size: 1.05rem; }
.beneficios span, .passos span { color: var(--suave); }
.passos { counter-reset: passo; }
.passos li { background: #fff; border: 1px solid var(--borda); }
.passos li::before {
  counter-increment: passo; content: counter(passo);
  width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center;
  background: var(--royal); color: #fff; font-weight: 700; margin-bottom: 6px;
}

.cidades { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.cidades li { background: var(--gelo); color: var(--marinho); font-weight: 600; padding: 8px 16px; border-radius: 999px; }

.chamada { background: var(--marinho); color: #dfe6fa; }
.chamada h2 { color: #fff; }
.chamada p { margin: 0; }
.chamada-grade { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }

.rodape { background: #10183a; color: #aab6d6; padding: 28px 0 96px; font-size: .95rem; }
.rodape p { margin: 0 0 6px; }
.rodape strong { color: #fff; }
.rodape a { color: #d5ddf2; }
.pequeno { font-size: .85rem; }

.whats-flutuante {
  position: fixed; right: 18px; bottom: 18px; z-index: 20;
  width: 60px; height: 60px; border-radius: 50%; display: grid; place-items: center;
  background: var(--whats); color: #fff; box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
}

@media (max-width: 900px) {
  .cartoes, .beneficios, .passos { grid-template-columns: repeat(2, 1fr); }
  .heroi-grade { grid-template-columns: 1fr; }
  .heroi-arte { display: none; }
  .topo nav { display: none; }
  .topo-linha .botao-pequeno { margin-left: auto; }
}
@media (max-width: 560px) {
  .cartoes, .beneficios, .passos { grid-template-columns: 1fr; }
  .marca img { width: 140px; }
  .heroi { padding: 44px 0 52px; }
  .secao { padding: 48px 0; }
  .acoes .botao { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .botao { transition: none; }
}